Characteristics and Sampling Efficiency of Eight-Unit Linear Slot Impactor (EULSI)
Abstract
The aerosol sampling efficiency was determined for an Eight-Unit Linear Slot Impactor (EULSI) developed at the Texas A&M University (College Station, TX). EULSI is a virtual impactor that has one concentration stage consisting of eight parallel linear accelerating and eight matching receiving jets. Sampling efficiency was determined using 1 - and 3-mum fluorescent polystyrene latex (PSL) microspheres; 5-, 7-, 9-, and 12-mum fluorescent oleic acid particles; and dry Bacillus subtilis vat. niger [Bacillus globigii (Bg)]. The results show a broad maximum sampling efficiency response of 35-37% between 3 and 7 mum. The efficiency drops off slightly at 9 and 12 mum, but only to 32 and 28%, respectively. The l-mum PSL and Bg particles yielded a sampling efficiency of 2l% + 3 and 17% + 12 respectively. The standard deviation for the measured sampling efficiency of the Bg particles was higher (+ 12) compared to the standard deviation of the non-biological particles due to culturing variability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2006
- Accession Number
- ADA457463
Entities
People
- Jana S. Kesavan